<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class='button-wrapper'>
                        <div class='button'>{{this.city}}</div>      
                    </div> 
                    
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class='button-wrapper'
                    v-for='item of hot'
                    :key='item.id'
                    @click="handleCityClick(item.name)">
                        <div class='button'>{{item.name}}</div>      
                    </div> 
                    
                </div>
            </div>
            <div class="area" 
                v-for='(item,key) of cities' 
                :key='key'
                :ref="key"
                >
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div class="item border-bottom"
                         v-for='innerItem of item' 
                         :key='innerItem.id'
                         @click="handleCityClick(innerItem.name)"
                    >{{innerItem.name}}</div>
                </div>
            </div>
        </div>
    </div>
</template>


<script>
import Bscroll from 'better-scroll'
import { mapState } from 'vuex'
import { mapMutations } from 'vuex'
    export default {
        name:'CityList',
        mounted (){
            this.scroll = new Bscroll(this.$refs.wrapper)
        },
        props:{
            hot :Array,
            cities:Object,
            letter:String
        },
        computed:{
            ...mapState({
                city:'city'
            })
        },
        watch:{
            letter (){
                // console.log(this.letter)
                if(this.letter){
                    const element = this.$refs[this.letter][0]
                    // console.log(element)
                    this.scroll.scrollToElement(element,500)
                }

            }
        },
        methods:{
            handleCityClick (city){
                // this.$store.dispatch('changeCity',city)
                this.changeCity(city)
                 this.$router.push('/')
            },
            ...mapMutations(['changeCity'])
        }
    }
</script>


<style lang="stylus" scoped>
@import '~styles/varibles.styl';
.border-topbottom
    &:before
        border-color:#ccc
    &:after
        border-color #ccc   
.border-bottom
    &:before
        border-color:#ccc
.list
    position absolute
    top 1.6rem
    left 0
    right 0
    bottom 0
    overflow hidden

    .title
        line-height .54rem
        background #eee
        padding-left .2rem
        color #666
        font-size .26rem
        touch-action: none;
    .button-list
        padding 0.1rem .6rem .1rem .1rem
        overflow hidden
        .button-wrapper
            width 33.33%
            float left 
            .button
                text-align center
                margin:.1rem
                border:.02rem solid #ccc
                padding .1rem 0 
                border-radius .06rem

    .item-list
        .item
            line-height .76rem
            // color #666
            padding-left .2rem
            touch-action: none;
</style>
